Missions overseas and in senior leadership positions at the United States Department of State, including as Chargé d'Affaires and Deputy Chief of Mission in Madagascar, Executive Director of the Bureau of African Affairs, Desk Officer at the Office of West African Affairs in the Bureau of African Affairs, and as General Services Officer at the U.S. Embassy in Ouagadougou, Burkina Faso.

Recently he served as Acting Deputy Assistant Secretary for East Africa and the Sudans in the Bureau of African Affairs at the Department of State.

[2] On August 16, 2018, President Donald Trump announced his intent to nominate Stromayer as the next United States Ambassador to Togo.

[3] On January 2, 2019, his nomination was confirmed in the United States Senate by voice vote.

"[8] Stromayer speaks French, Italian, Hungarian, Wolof, Haitian Creole, and some Spanish.